center-lock hubs and wheels

[Wack Attack]

I'm researching center-lock hubs and wheels for next year and was wondering if people who have done it can tell me if they/it:
1. reduced total unsprung weight of wheel and hub package.
2. considered a tapered area between the wheel and hub to maximize contact area or went with a splined solution.

[jack]

2: you can also use pins, similiar to F1

accually, i was just wondering where people get the nuts for center-locks? i was going to just look at summit racing or something. any good sources?

[Denny Trimble]

What's that? A purchased part on a WWU car?

[RaID]

1. not really due to the use of centre-lock hubs
but rather due to the design of the uprights in our case

2. were using a triple drive dowel approach

and we are manufacturing our own centre-lock nuts
that way they suit our design exactly

[Greg H]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by jack:
accually, i was just wondering where people get the nuts for center-locks? <HR></BLOCKQUOTE>
Jack, we are going to center-locks this year and are planning on manufacturing the nuts and possibly the socket ourselves.

[jack]

thats what i was afraid of--i thought we would end up making them. denny guesses right

[Wack Attack]

I don't think F1 uses pins to keep the wheels from falling off. That would slow down tire changes. I think the rear center-lock lugs are left-hand threaded so they tightened under acceleration and the front are right-hand threaded so they tightened under braking.

[Denny Trimble]

I heard the commentators say that F1 teams are required to run a retention device that retains the wheel in case of nut loosening. They were quite baffled at how the Minardi managed to lose a wheel in China...

I'm sure it's automatic and activated by the air gun.

[jack]

here are the pins i was talking about:

[John Bucknell]

Jack's got the right picture.

That purple anodized pin is the locking mechanism. The gun pushes it in and the linkage connected to the central pin yanks the peripheral pins in (or in some cases they are just ball bearings). The tire man pulls the pin back out after the wheel change and torquing of the nut.